Stove-pipe damper



UNITED STATES PATENT OFFICE.

WILLIAM SOULLY, OF DETROIT, MICHIGAN.

STOVE-PIPE DAM PER.

SPECIFICATION forming part of Letters Patent No. 236,913, dated January 25, 1881.

Application iiled September 16, 1880. (No model.)

To all whom it may concern:

Be it known 'that I, WILLIAM SCULLY, of Detroit, in the county of Wayne and State of Michigan, have invented an Improvement in Stove-Pipe Dampers, of which the following is a specication.

My invention relates to that class of stovepipe dam pers in which the dam per-plate is secured to its shaft and held in any desired position in the pipe Without the interposition of a spring or equivalent device between the pipe and handle; and my invention consists in certain improvements in the construction and arrangement of the parts, as hereinafter more fully set forth.

Figure -l is a perspective view of my improved damper. Fig. 2 is a vertical central section through the plate and shaft.

In the accompanying drawings, which form a part of this specification, A represents a section of a stove-pipe, within which a damper is secured in holes in the walls of the pipe to form bearings for the `damper-shaft.

C represents the damper-plate, preferably of cast metal, and in which is formed the central depression to receive the shaft, and it is also provided with the sockets a a', one at each side. The socket a is provided with a shoulder, d, adapted, when the damper is inserted in the pipe, to bear against the interior of the pipe, and the socket a has a slot or opening in its top face, with abar, a2, extending across it. A curvilinear slot, b,is` also formed in the damper-plate, which forms the tongue D in the plate. v

E is the damper-shaft, provided with circular bearings c, to engage with the holes in the pipe when the damper is in place. The body of the damper-shaft E is rectangular or flattened in cross-section, to lit into the central depression in the plate. A shoulder, e, is cast upon one face of the shaft, near the opposite end to the handle F. The face c' of this shoulder is inclined, while the outer face of the bar a2 is straight, and so arranged that when the shaft is in place the inclined face will draw the iiange h of the handle F into frictional contact with the adjacent Wall of the pipe.

When the damper is placed Within the stovepipe the shaft is inserted through the hole near the slotted side of the damper-plate, and is pushed along the depression in the plate until the end of the shaft enters the hole in the opposite side of the pipe. In doing this the shoulder c depresses the tongue D until the inclined face of the shoulder is compelled to engage with' the face of the socket, the spring of the plate always having a tendency to compel the shaft to draw the head thereof against the pipe.

What I claim as my invention is The combination, with the damper-plate C, provided with a curvilinear slot, b, and tongue D, a socket, a, having a shoulder, d, and a socket, a', having an opening in its top, with a bar, a2, extending across it, ofthe damper-shaft E, provided with the shoulder ,c, having the inclined face e', and the handle F, having the circular flange h, adapted to bear against the exterior of the pipe, substantially as described, and for the purpose set forth.

WMI soULLY.

Witnesses H. S. SPRAGUE, E. ScULLY. 

